Hydraulic piering can be used to lift and stabilize sinking concrete. Whether you have cracks, water problems or settling basement walls hydraulic push piers may be the best solution for your foundation repairs. Foundation settlement and movement requiring foundation repair can be caused by building on expansive clay or improperly compacted fill soils, or the lack of maintenance around foundations. Whatever the reason, understanding steel hydraulic push piers is the first step to fixing your concrete foundation problem.
Hydraulic push piers are driven pier systems consisting of sections of galvanized steel pipe supporting steel foundation brackets. The piers are a point bearing pile that are driven with a hydraulic ram through unstable soils to a load bearing strata. Sufficient hydraulic pressure is required to make sure that the pier material is able to reach this load bearing stratum or bedrock. Pressures of 4,000 to 8,000psi are very common on average homes.
Each pier is then individually load tested, and the structure is either stabilized or lifted with a synchronized hydraulic manifold system to insure maximum practical recovery. The manifold system is generally required by foundations engineers to lift or effectively stabilize a home. This system has been shown to successfully support structures in virtually all soil conditions, and can be used for stabilizing foundations and slabs built on questionable soil, as well as seismic protection, and commercial applications.
For more detailed information on the steps of repairing a failed foundation visit http://www.earthcontactproducts.com/PierInstallationSequence.asp